Volume 75, Issue 19

6 November 1995

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LETTERS

Gravitation and Astrophysics

Einstein and Yang-Mills Theories in Hyperbolic Form without Gauge Fixing

Andrew Abrahams, Arlen Anderson, Yvonne Choquet-Bruhat, and James W. York, Jr.

Phys. Rev. Lett. 75, 3377 (1995) - Published 6 November, 1995

Pair Production of Black Holes on Cosmic Strings

S. W. Hawking and Simon F. Ross

Phys. Rev. Lett. 75, 3382 (1995) - Published 6 November, 1995

Pair Creation of Black Holes Joined by Cosmic Strings

R. Emparan

Phys. Rev. Lett. 75, 3386 (1995) - Published 6 November, 1995

Breaking Cosmic Strings without Monopoles

Douglas M. Eardley, Gary T. Horowitz, David A. Kastor, and Jennie Traschen

Phys. Rev. Lett. 75, 3390 (1995) - Published 6 November, 1995

Elementary Particles and Fields

QCD Corrections from the Top Quark to Relations between Electroweak Parameters up to Order $α_{s}^{2}$

K. G. Chetyrkin, J. H. Kühn, and M. Steinhauser

Phys. Rev. Lett. 75, 3394 (1995) - Published 6 November, 1995

Nuclear Physics

$Δ I = 4$ Bifurcation without Explicit Fourfold Symmetry

Yang Sun, Jing-ye Zhang, and Mike Guidry

Phys. Rev. Lett. 75, 3398 (1995) - Published 6 November, 1995

Atomic, Molecular, and Optical Physics

Absolute Calibration of Electric Fields Using Stark Spectroscopy

G. D. Stevens, C.-H. Iu, T. Bergeman, H. J. Metcalf, I. Seipp, K. T. Taylor, and D. Delande

Phys. Rev. Lett. 75, 3402 (1995) - Published 6 November, 1995

Problems with the Standard Semiclassical Impact Line-Broadening Theory

Spiros Alexiou

Phys. Rev. Lett. 75, 3406 (1995) - Published 6 November, 1995

Selective Excitation of Vibrational Wave Packet Motion Using Chirped Pulses

C. J. Bardeen, Q. Wang, and C. V. Shank

Phys. Rev. Lett. 75, 3410 (1995) - Published 6 November, 1995

Low Energy $(< 5 eV)$ $F^{+}$ and $F^{-}$ Ion Transmission through Condensed Layers of Water: Enhancement and Attenuation Processes

Mustafa Akbulut, Norbert J. Sack, and Theodore E. Madey

Phys. Rev. Lett. 75, 3414 (1995) - Published 6 November, 1995

Observation of Structure in Differential Transfer Ionization of Argon Atoms by Positrons

T. Falke, W. Raith, and M. Weber

Phys. Rev. Lett. 75, 3418 (1995) - Published 6 November, 1995

Quantum Nondemolition Demonstration via Repeated Backaction Evading Measurements

K. Bencheikh, J. A. Levenson, Ph. Grangier, and O. Lopez

Phys. Rev. Lett. 75, 3422 (1995) - Published 6 November, 1995

Nonclassical Excitation for Atoms in a Squeezed Vacuum

N. Ph. Georgiades, E. S. Polzik, K. Edamatsu, H. J. Kimble, and A. S. Parkins

Phys. Rev. Lett. 75, 3426 (1995) - Published 6 November, 1995

Optical “Multiexcitons”: Quantum Gap Solitons in Nonlinear Bragg Reflectors

Ze Cheng and Gershon Kurizki

Phys. Rev. Lett. 75, 3430 (1995) - Published 6 November, 1995

Nonlinear Dynamics, Fluid Dynamics, Classical Optics, Etc.

Universal Behavior of Lyapunov Exponents in Unstable Systems

Aldo Bonasera, Vito Latora, and Andrea Rapisarda

Phys. Rev. Lett. 75, 3434 (1995) - Published 6 November, 1995

Power Law Wave-Number Spectra of Scum on the Surface of a Flowing Fluid

Thomas M. Antonsen, Jr., Arthur Namenson, Edward Ott, and John C. Sommerer

Phys. Rev. Lett. 75, 3438 (1995) - Published 6 November, 1995

Transport Properties of Random Media: A New Effective Medium Theory

K. Busch and C. M. Soukoulis

Phys. Rev. Lett. 75, 3442 (1995) - Published 6 November, 1995

Atomic Interferometry with the Micromaser

G. Raithel, O. Benson, and H. Walther

Phys. Rev. Lett. 75, 3446 (1995) - Published 6 November, 1995

Transition between Positive and Negative Hexagons in Optical Pattern Formation

T. Ackemann, Yu. A. Logvin, A. Heuer, and W. Lange

Phys. Rev. Lett. 75, 3450 (1995) - Published 6 November, 1995

Lateral Capillary Forces Measured by Torsion Microbalance

C. D. Dushkin, P. A. Kralchevsky, H. Yoshimura, and K. Nagayama

Phys. Rev. Lett. 75, 3454 (1995) - Published 6 November, 1995

Condensed Matter: Structure, Etc.

Breaking of Rotational Symmetry during Decomposition of Elastically Anisotropic Alloys

O. Paris, M. Fährmann, and P. Fratzl

Phys. Rev. Lett. 75, 3458 (1995) - Published 6 November, 1995

Elastic Isotropy and Anisotropy in Quasicrystalline and Cubic AlCuLi

P. S. Spoor, J. D. Maynard, and A. R. Kortan

Phys. Rev. Lett. 75, 3462 (1995) - Published 6 November, 1995

Crystallization of Opals from Polydisperse Nanoparticles

Pamela C. Ohara, Daniel V. Leff, James R. Heath, and William M. Gelbart

Phys. Rev. Lett. 75, 3466 (1995) - Published 6 November, 1995

Yield Strength of Diamond

T. Suzuki, I. Yonenaga, and H. O. K. Kirchner

Phys. Rev. Lett. 75, 3470 (1995) - Published 6 November, 1995

Theoretical Confirmation of the High Pressure Simple Cubic Phase in Calcium

Rajeev Ahuja, Olle Eriksson, J. M. Wills, and Börje Johansson

Phys. Rev. Lett. 75, 3473 (1995) - Published 6 November, 1995

One-Stage Continuous Melting Transition in Two Dimensions

Julio F. Fernández, Juan J. Alonso, and Jolanta Stankiewicz

Phys. Rev. Lett. 75, 3477 (1995) - Published 6 November, 1995

Entropic Expulsion in Vesicles

Roy Bar-Ziv, Thomas Frisch, and Elisha Moses

Phys. Rev. Lett. 75, 3481 (1995) - Published 6 November, 1995

Commensurate and Incommensurate Phases at Reconstructed (In,Ga)As(001) Surfaces: X-Ray Diffraction Evidence for a Composition Lock-in

M. Sauvage-Simkin, Y. Garreau, R. Pinchaux, M. B. Véron, J. P. Landesman, and J. Nagle

Phys. Rev. Lett. 75, 3485 (1995) - Published 6 November, 1995

Condensed Matter: Electronic Properties, Etc.

Quasiparticle Band Structure of CdS

Michael Rohlfing, Peter Krüger, and Johannes Pollmann

Phys. Rev. Lett. 75, 3489 (1995) - Published 6 November, 1995

Adaptive Renormalization Group Approach to Electron Correlations

Shoudan Liang

Phys. Rev. Lett. 75, 3493 (1995) - Published 6 November, 1995

Spectral Weight Transfer of the Optical Conductivity in Doped Mott Insulators

T. Katsufuji, Y. Okimoto, and Y. Tokura

Phys. Rev. Lett. 75, 3497 (1995) - Published 6 November, 1995

Hidden Breit-Wigner Distribution and Other Properties of Random Matrices with Preferential Basis

Ph. Jacquod and D. L. Shepelyansky

Phys. Rev. Lett. 75, 3501 (1995) - Published 6 November, 1995

Friedel Oscillations for Interacting Fermions in One Dimension

Reinhold Egger and Hermann Grabert

Phys. Rev. Lett. 75, 3505 (1995) - Published 6 November, 1995

Continuum Quantum Ferromagnets at Finite Temperature and the Quantum Hall Effect

N. Read and Subir Sachdev

Phys. Rev. Lett. 75, 3509 (1995) - Published 6 November, 1995

Single Domain Switching Investigated Using Telegraph Noise Spectroscopy: Possible Evidence for Macroscopic Quantum Tunneling

F. Coppinger, J. Genoe, D. K. Maude, Ulf Gennser, J. C. Portal, K. E. Singer, P. Rutter, T. Taskin, A. R. Peaker, and A. C. Wright

Phys. Rev. Lett. 75, 3513 (1995) - Published 6 November, 1995

Oblique Confinement and Phase Transitions in Chern-Simons Gauge Theories

M. C. Diamantini, P. Sodano, and C. A. Trugenberger

Phys. Rev. Lett. 75, 3517 (1995) - Published 6 November, 1995

Vortex-Motion-Induced Voltage Noise in ${YBa}_{2} {Cu}_{3} O_{7 - δ}$ Single Crystals

G. D'Anna, P. L. Gammel, H. Safar, G. B. Alers, D. J. Bishop, J. Giapintzakis, and D. M. Ginsberg

Phys. Rev. Lett. 75, 3521 (1995) - Published 6 November, 1995

Direct Shear Probe of Vortex Lattice Melting in B $i_{2}$ S $r_{2}$ CaC $u_{2}$ $O_{8}$ Single Crystals

H. Pastoriza and P. H. Kes

Phys. Rev. Lett. 75, 3525 (1995) - Published 6 November, 1995

Quasiparticle Mean Free Path in YB $a_{2}$ C $u_{3}$ $O_{7}$ Measured by the Thermal Hall Conductivity

K. Krishana, J. M. Harris, and N. P. Ong

Phys. Rev. Lett. 75, 3529 (1995) - Published 6 November, 1995

Observation of Maximum Supercurrent Quantization in a Superconducting Quantum Point Contact

Hideaki Takayanagi, Tatsushi Akazaki, and Junsaku Nitta

Phys. Rev. Lett. 75, 3533 (1995) - Published 6 November, 1995

Thermodynamic Limit of Density Matrix Renormalization

Stellan Östlund and Stefan Rommer

Phys. Rev. Lett. 75, 3537 (1995) - Published 6 November, 1995

Large Magnetovolume Effect in Yttrium Doped La-Ca-Mn-O Perovskite

M. R. Ibarra, P. A. Algarabel, C. Marquina, J. Blasco, and J. García

Phys. Rev. Lett. 75, 3541 (1995) - Published 6 November, 1995

Determination of the Nuclear Quadrupole Moment of $^{57}$ Fe

Philipp Dufek, Peter Blaha, and Karlheinz Schwarz

Phys. Rev. Lett. 75, 3545 (1995) - Published 6 November, 1995

Observation of Isotope Effects in Sonoluminescence

Robert A. Hiller and Seth J. Putterman

Phys. Rev. Lett. 75, 3549 (1995) - Published 6 November, 1995

Band Effect on Inelastic Rare Gas Collisions with Solid Surfaces

R. Souda, K. Yamamoto, W. Hayami, T. Aizawa, and Y. Ishizawa

Phys. Rev. Lett. 75, 3552 (1995) - Published 6 November, 1995

Cross-Disciplinary Physics

Growth and Structure of Random Fibre Clusters and Cluster Networks

N. Provatas, T. Ala-Nissila, and M. J. Alava

Phys. Rev. Lett. 75, 3556 (1995) - Published 6 November, 1995

Observation of Front Bifurcations in Controlled Geometries: From One to Two Dimensions

G. Haas, M. Bär, I. G. Kevrekidis, P. B. Rasmussen, H.-H. Rotermund, and G. Ertl

Phys. Rev. Lett. 75, 3560 (1995) - Published 6 November, 1995

Delay-Induced Chaos in Catalytic Surface Reactions: NO Reduction on Pt(100)

N. Khrustova, G. Veser, A. Mikhailov, and R. Imbihl

Phys. Rev. Lett. 75, 3564 (1995) - Published 6 November, 1995

Effect of the Condensed Phase on Dissociative Electron Attachment: ${CH}_{3} Cl$ Condensed on a Kr Surface

L. Sanche, A. D. Bass, P. Ayotte, and I. I. Fabrikant

Phys. Rev. Lett. 75, 3568 (1995) - Published 6 November, 1995

Observation of Accelerated Nucleation in Dense Colloidal Fluids of Hard Sphere Particles

J. L. Harland, S. I. Henderson, S. M. Underwood, and W. van Megen

Phys. Rev. Lett. 75, 3572 (1995) - Published 6 November, 1995

Correlation between Shear Viscosity and Anisotropic Domain Growth during Spinodal Decomposition under Shear Flow

Jörg Läuger, Christian Laubner, and Wolfram Gronski

Phys. Rev. Lett. 75, 3576 (1995) - Published 6 November, 1995

COMMENTS

Comment on “Acoustic Band Structure of Periodic Elastic Composites”

M. M. Sigalas and E. N. Economou

Phys. Rev. Lett. 75, 3580 (1995) - Published 6 November, 1995

Kushwaha et al. Reply

M. S. Kushwaha, P. Halevi, L. Dobrzynski, and B. Djafari-Rouhani

Phys. Rev. Lett. 75, 3581 (1995) - Published 6 November, 1995

Comment on “Invariant Measure and Turbulent Pinch in Tokamaks”

V. V. Yankov and J. Nycander

Phys. Rev. Lett. 75, 3582 (1995) - Published 6 November, 1995

Isichenko, Gruzinov, and Diamond Reply:

M. B. Isichenko, A. V. Gruzinov, and P. H. Diamond

Phys. Rev. Lett. 75, 3583 (1995) - Published 6 November, 1995

Comment on “Transverse Gauge Interactions and the Vanquished Fermi Liquid”

B. L. Altshuler, L. B. Ioffe, and A. J. Millis

Phys. Rev. Lett. 75, 3584 (1995) - Published 6 November, 1995

Chakravarty, Norton, and Syljuåsen Reply:

Sudip Chakravarty, Richard E. Norton, and Olav F. Syljuåsen

Phys. Rev. Lett. 75, 3585 (1995) - Published 6 November, 1995

Comment on $“^{13}$ C NMR Study of Layered Organic Superconductors Based on BEDT-TTF Molecules”

H. Mayaffre, P. Wzietek, and D. Jérome

Phys. Rev. Lett. 75, 3586 (1995) - Published 6 November, 1995

Kawamoto et al. Reply:

A. Kawamoto, K. Miyagawa, Y. Nakazawa, and K. Kanoda

Phys. Rev. Lett. 75, 3587 (1995) - Published 6 November, 1995

ERRATA

Ultraviolet-Renormalon Calculus

A. I. Vainshtein and V. I. Zakharov

Phys. Rev. Lett. 75, 3588 (1995) - Published 6 November, 1995

Atomic Scale Studies of Segregation at Ceramic/Metal Heterophase Interfaces

D. A. Shashkov and D. N. Seidman

Phys. Rev. Lett. 75, 3588 (1995) - Published 6 November, 1995

In Search for Signs of Chaos in Branching Processes

Zhen Cao and Rudolph C. Hwa

Phys. Rev. Lett. 75, 3588 (1995) - Published 6 November, 1995